A kind of slagging agent for semi-steel desulfurization and slag removal and its preparation and use method
The technology of slag conditioning agent and desulfurization slag is applied in the field of semi-steel desulfurization, which can solve the problems of large consumption of iron and steel materials, high iron loss, and increase in cost, and achieve the effect of reducing iron loss, reducing cost and reducing the amount of sulfur returned.
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[0022] The preparation method of the slagging agent of the present invention comprises the following steps: taking 20% to 40% of C, 2% to 10% of SiO 2 , 2% to 20% Al 2 o 3 , 30% to 40% of MgO are uniformly mixed, made into spherical particles with a diameter of 20 to 40 mm, dried until the water content is not more than 2.0%, and the slag adjusting agent for semi-steel slag removal is obtained. The drying can use conventional drying methods such as air drying, hot air drying, baking drying and the like. In addition, spherical granules can be prepared using granulation equipment and processes commonly used in the art.
[0023] The method for removing slag and adjusting slag of the semi-steel after desulfurization of the present invention comprises the following steps: after the desulfurization of the semi-steel is completed, the slag is removed from the desulfurized semi-steel, and the remaining amount of the desulfurized slag to be removed is 1 / 5 of the original desulfuriz...
Embodiment 1
[0025] Embodiment 1 Preparation and use of slagging agent for semi-steel slag removal of the present invention
[0026] Take 34.5% C, 8.7% SiO 2 , 18.6% Al 2 o 3 , 38.2% of MgO are mixed uniformly, and become spherical particles by mechanism, the proportion of the total weight is 96.4% for those with a diameter of 20-40mm, and 3.6% for those with a diameter of less than 5mm. The obtained semi-steel desulfurization and slagging slagging agent has a measured moisture content of 1.2%.
[0027] After the vanadium-titanium molten iron is blown through the converter to extract vanadium from the molten iron, vanadium-rich vanadium slag and sulfur-containing semi-steel are formed respectively. After the high-sulfur semi-steel enters the desulfurization station, the weight is 135t, the temperature is 1362°C, and the composition is: C3.82%, Mn0.01%, V0.03%, Si0.02%, S0.075%, P0.075% , Ti0.001%, and the balance of iron and unavoidable impurities. Add desulfurizer for desulfurization...
Embodiment 2
[0028] Embodiment 2 The preparation and use of the slagging agent for semi-steel slag removal of the present invention
[0029] Take 33.8% C, 8.9% SiO 2 , 19.1% Al 2 o 3 , 38.2% of MgO mixed evenly, through the mechanism into spherical particles, the diameter of 20 ~ 40mm accounted for 94.2% of the total weight, the weight ratio of less than 5mm was 5.8%, the measured moisture content was 1.1%. A semi-steel desulfurization and slag removal agent is obtained.
[0030] After the vanadium-titanium molten iron is blown through the converter to extract vanadium from the molten iron, vanadium-rich vanadium slag and sulfur-containing semi-steel are formed respectively. After the high-sulfur semi-steel enters the desulfurization station, the weight is 140t, the temperature is 1374°C, and the composition is: C3.65%, Mn0.011%, V0.029%, Si0.018%, S0.085%, P0.071% , Ti0.001%, and the balance of iron and unavoidable impurities. Add desulfurizer for desulfurization. After the desulfur...
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